Lathe carriage



Dec. 21 1926. 1,611,191

E. F. HEARD'Er AL LATHE CARRIAGE Filed Nov. 14. 1924 4 76 UME annum: Z9

THE/ A TTORNEYS Patented i Dec'.V 21,1926f4 n; .sfr

EDMUND F. ,HEARDgJor ELrzAnn'rH Grrr courir?,

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NEWPORT News, vrnernre, Asszeuens ro rinwronr unive snrrnurnnrnea DRY' l DOCK`COMPANY,.OF1TEWPORT NEXUS, VIRGINIA. A CORORATION LATHE certamen.`

on .vrneINL/a.

,Appiiaiicni mediamente-r leraar sen-.11 no. 749,854.

Our invention relates to lathes andhas for its object the'provision of an improved device of this character of simple and rugged construction which maybe readily adjusted f e' for accurate' and rapid operation.

More' particularly, our vinvention relates to a double'gang tool holder lath`e,vwhereby anv axle orshaft, having a multiplicity "of diameter orrsha'pes,` may be vrough turned l and finished in twogstrolrfes of thecarriage Vof a doublejlathe witha central .driving head, without changing the relation ofthe tools vto each other Vduring theoperationand wherebyr the entire operation maybe perl formedon one machine without removing the aXle or shaft from the machine.V i Another object'ofour invention is to provide removable Y tool blocks, or holders, whereby the tools may be preset for use and whereby broken or dulled tools may be readily replaced.

Our invention will ybe ybetter understood vfrom the following description taken iny connection with the Vaccompanying Idraw- 25 ings and itsscopewill be pointed out in the appended claims., o Y

In. the drawings lillustrating ourl invention:AV i f Y Fig. 1 is a vertical section taken at right angles to the lathe centers, `of a lathe em bodying our'invention; i 1 E 'Figa 2 is an elevat-ion of the tool carriage Y as viewed vfrom the operating 'sidel of the and Y A. v I

Fg- 3 is a tOP Plan view of the parts shown in Fig. l. a f v Referring to the drawings in which "l in` with and on opposite' sides of the lathe center axis 3, which 'seats' respectively sup-v port similar tool blocks orv holders 7, '8.`

Each of said holders is provided with a held or fixed therein in ythe usual manner',

with their cutting edges upward( It de#` sired, theseV tools may be preset by our pre machine with thegang tool holder in place,v

The slide 2f is prof vided with similar tool seats 5, Gparallel plurality offtoolsfor cutters 10,11 which are issued February 9, 1926.'- The `toolsmay be used for both turningorforming, thetools l in one of the holders being usedfor roughing, and in the other Jfor linishing. 1 Having'sctl the'tools 1 0 and 11 in th'eirrespe'ctiveholders in the proper relation to produce'thedesired `shape of the axle or shaft-, the .holder with the roughening tools vis moved vby means of vthe cross-fed screw l to bring thewtools intoy engagement with the w-Orlr. i Nhentlie rough-v ing operation is completed, the blocltwfis tV n ioved awayV froinithe work` 'by' means` of screw d, which simultaneously advancesthe `edges upward, the rotation of `the piece being shapedmust beA4 reversed when vchanging from one set of the tools to the other.` It islot' course understood that the tool holdv ers may be moved parallel l'or atan angle lblock withthe finishing tools in a manner 1 to the lathe centers inthe usual manner. In

order to-limit the movement of the slide 2,',

carriage l2is providedwith a' stop 12, adapted to strikegagainstthe screws maand-14, l positioned, in oppositesides thereof and carried on the slide 2".,3 Thus, Whenthe tools `have been advanced the properdistance, the

screwslB and 14 are; adjusted to bearagainst vthe stop 12. 'In this manner, adjustment may be made forV duplicating the work.

" To avoid loss of-'time in case any of the'v tools become broken, ordulled so as to make ers or blocks 7, 8 are made easily removable.

Since both blocks arevsimila r, a description of one will suttice..

The bottom surface of vthe tool holder is'.

2f., A key or gib 16 is provided for properly positioning the holder with respect to the .replacement necessary, or in order toenalflev the tools tobepreset in the holder,fthe holdlathe centersfwhich vkey is set upv byja screw f 17. The holder isl'oclred on its seat by placing it thereon, and pushing it back until the lip 15 engages lip 7 15, insertingkeyl and I tightening screw v17vv and then swinging hinged-screws 18, about their pivots 19'on slide 2,. until theirlupper ends engage co-V operating slots 2O formed in the toolholder,

which screwsfare then tightenedby nuts 21T 1 thereon. -The adjusting screws 17 acting 'Y the downward projecting firmly into contact with Yjecti'ng angular lip against key 16 which is in contact withvertical finished surface21 of tool seat 6 forces the upward pro` thus maintaining the distance between the center of the lathe and .the various tools. At the same time, by allowing proper clearance at the V-angles 15, 15, the action of screws 17 tends to force 1 the bottom of the blockvfirmly down on its seat. Due to the necessary overhanging of Y the tools, the pressure due to the cutting action causes a tendency for l holder to pivot around a point X. YHinged f boltslS resist this pivoting action by being the block or put in pure tension. Thus no bolts or screws used to secure the holderto the slide rest 2f "are stressed in shear. i

- holder 22 by screws In order that the end of shafts or axles may be turned or faced, an additional tool is provided. Vfhile but one of these holders is shown in Fig. 3, it is to be understood that, each of the tool'lholders '7, 8, may by providedwith such holders. The holder 22 isv `carried on a slide 23, fixed to the holder 7 or 8. A tool of suitable form may be inserted in opening 24, and secured 25 and the holder 22 inay be moved in slide 23' by-screw 26. f

While we have referred to double lathes herein, it is to be understood that our invention may be used on single lathes of the engine, automatic or turret types.

Frein aconsideration of the above description, takenr in' connection with the draw- Y ings, our invention will be appa-rent without further explanation', and the advantages set forth prior to the detailed description will be readily recognized. Ve dov not wish to be understood as being limitedto the details of angular lip 15 forni or arrangenientof parts since various changes may be inadeby those skilled in the art without departingfrom` the spirit and scope of our invention. V

`What we claim Vand `desire to secure by United States Letters Patent is:

l1. in a latheY carriage a transverse tool slide, ascrew for adjusting the position of said slide, tool holders mounted on said slide7` said slidebeing provided with transverse seats for allowing transverse movement of said holders on said slide and bolts pivoted on the outer portions of said slide and adapted to engage 'the outer ends of saidholders to counteract the downward pressure of the work on the inner ends of said holders.

2. In la lathe carriage a transverse tool slide having transverse tool holder l.seats thereon which are undercut along theired'ges nearest the lathe centerline duplicate tool holdersv on opposite sides of` tliencenter of Y said slide and adapted tosupport a plu-y rality of Vcutting tools having upper cutting edges sothat the cutting pressure of the work thereon is downward when the worlr'is rotated in opposite directions, saidy tool holder having recesses therein'to cooperate Vwith said undercut edges andV being- Vremovably mounted upon saidcarriage, said tool holders also having a plurality of reces-ses in their outer ends,y a plurality of bolts piv-r oted to said slide and adapted to be rotated about their pivot pointsinto said recesses in saidholders to retain the tool holder' rigidly in position andl to counteract the downward pressure ofy th'e'lworkv at the inner ends of said tool holders; i .Y l, l

Signed this- 7th day `of Novembery1924.

'EDMUND F. HEARD-.

MAYO M.v FITZ HUGH. 

